<template>
    <div>
        <div class="new-box">
            <div class="header">
                <van-nav-bar
  title="标题"
  left-text="返回"
  right-text="按钮"
  left-arrow
  @click-left="onClickLeft"
  @click-right="onClickRight"
/>
            </div>
        </div>
    </div>
</template>